Loose-leaf binder



2 Sheets-Sheet 1 l- Alun G. A. OLSEN LOOSE LEAF BINDER Filed NOV.V 30

Aug. 26, 1924.y

. 0 zml Aug. 26 1924.

G. A. OLsEN `LOGS E LEAF BINDER Filed Nov. so. 192s sheets-snaai Patented Aug. 26, 1924.

UNlTED STATES 1,506,251 PATENT Fries.

GEORGE A. OLSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ACCOUNTING- DEVICES COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LOOSE-LEAF BINDER.

Application filed November 30, 1923. Serial No. 677,843.

To all who-1nz't may concern Be it known that l, GEORGE A. OLsnN, a citizen of the United States, residing at Chicago, in the county of Cool; and State of l'llinois, hare invented a new and useful Improvement in Loose-Leaf Binders, of which the following is a specification.

This invention relates to loose-leaf binders and is fully described in the following specification and shown in the accompanying drawings in which:

Figure 1 is a partial front inside elevation of the iile open;

Figs. 2 and, 3 are sections on the lines 2 and 3 respectively of Fig. 1;

Fig. 4 is a transverse section on the line 4--4 of Fig. 1; and

Fig. 5 is an isometric projection of one of the prongs.

This binder comprises a back composed primarily of two channel shaped members 11 and 12 connected at one side by means of a hinge pin 13. The member 11 has a plurality of prongs 14 secured thereto and eX- tending across. the. leaf-receiving space, the end of these prongs making Contact with the ledge 15 on the member 12.

These prongs are arcuate and lie on the arc o-f a circular structure on the hinge pin 13. They are preferably secured to the outer flange 16 of the channel like member 11 and project outwardly through holes 17 in the ledge 13 of the member 11.

In the same way prongs 14a are secured to the inside of the flange 19 of the member 12 as by welding or brazing. For this purpose one end of the prong is flattened as shown at 14h (Fig. 5). The flattened ends 14b provide shoulders at 14c where the flattened portion joins the elongated portion of the prong. As shown in Fig. 3, these shoulders are adapted to abut against the inner surface of the ledge 18 when the device is assembled, thereby considerably stiflfening the union of the prong to the channel member.

The adjacent flanges 20 and 21 of the members 11 and 12 respectively (F ig. 4) are provided with registering openings 22 and 23. A bar 24 is slidably mounted within the member 12 and has catches 25 which project through the openings 23. The bar 24 has an end 26 which projects through the end 27 and this bar is normally held in the position shown in Figs. 1 and 2 by means of the tension spring 28.

The catches 25 normally hold the flanges 2O and 21 together thus retaining the back in looked position. To release the catches the operator presses the end 26 against the action of the spring 28 so that the catches 25 are permitted to pass through the openings 22.

To close and lock the back the operator merely brings the members to closing position when the sloping facing of the catches 25 will cause them to ride up and snap over the edges of the openings 22.

This binder is adapted to hold a series of sheets which are perforated to receive the prongs 14 and 14a. In order that the lower sheets may be pressed down over the` free ends of these prongs and be caught between them and the ledge against which they bear, I have provided a ridge 29 which lies adjacent the outer ends of these prongs so as to hold the sheets of paper away from the ends of the prongs.

To provide a free space within the prongs for the inner edges of paper, I have curved the baci-z of the channel members 11 and 12, the curvature being that of a curved surface whose radius is struck from the hinge pin as a center this insures an even smooth surface of uniform distance from the prongs throughout the greater' portion of their length.

To close the space in the rear of the channel members, there are shown L-shaped members 30-31 each having sides 32-33, the former sides acting as; closures for the open side of the channel. The side 33 is shown as in contact with the outer surface of its channel member and tongues 34 shown as formed integral with the sides 33, bent over and seated in the holes 35 in the webs of the channel. To close the end of each channel, the members 30 are provided with ends 36 shown as integral with the sides 32 of the members 30 or 31 and upturned for the purposes named, occupying the position shown in Fig. 3, when assembled.

`While I have shown and described cer tain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes therefore in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to cla-im all novelty inherent in my invention as broadly as possible in view of the prior art.

I claim:

l. A loose-leaf binder comprising two cl'iannel-shaped members hingedly connected flange to flange, with their flanges projecting rearwardly, and a set el arcuate prongs secured to each member, the arc of each prong being struck from the center of said hinge, all prongs being on arcs of the same radius, the ends of the prongs carried by one member lying substantially in contact with the other` member when the members are in closed position.

2. fr loose-leaf hinder comprising two channel-shaped members hingedly connected 'lange to fl ange, with their flanges projecting rearwardly, a set olf arcuate prongs secured to cach men'lber, the arc of each prong being struct: from the center of said hinge, all prongs being on arcs of the same radius, the ends of the prongs carried by one member lying substantially in contact with the other member when the members are in closed position, and a ridge on the web of each of said members past which said prongs project.

A loose-leal"- binder comprising two channel-shaped members hingedly connected 'Elange to flange, a set of arcuate prongs secured to each member, the arc of each prong being struck from the center of said hinge, the webs of said channel-shaped members each having a curve, the'ares ot the curves being struck substantially from said hinge,

and means for locking said members in operative position.

il. A loose-leaf binder comprising two channel-shaped members hingedly connected flange to flange, a set of arcuate prongs secured to each member, the arc of each prong a ridge on each of said members adjacent' the point of contact ot the free ends of the prongs and between said prongs and the hinge, and means for locking said members y in operative position.

5. A loose-leat1 binder comprising two channel-shaped members having contacting flanges hingedly connected together with their webs in a continuous surface, a member of L-shaped cross section enclosing the open back and ends ol each channel shaped member, and means for securing said members together.

6. loose-leaf binder comprising in combination, co-ac-ting channel and L-shaped members, Leach channel-shaped member hinged to a like member and each L-shaped member enclosing the open back and ends of its co-acting channel-shaped member, one of eac-h of said co-acting members having openings and the other thereot1 having tongues adapted to be inserted in said openings and bent to retain the co-acting members together.

7. A loose-leaf binder comprising in combination, a channel-shaped member having rearwardly projecting flanges and openings in its web, curved prongs having flattened lends and a shoulder at the jimction between the prong and its Aflattened portion, said prongs projecting through said openings with the shoulders abutting the rear surface of the web and said flattened end secured to the inner surface of the flange, whereby said prongs over-arch the web of the channel.

GEORGE A. OLSEN. 

